Identify what methods of bearing is good or bad

Bearing according to the different material, need not industry, is divided into many types, just from his appearance is very difficult to tell good or bad, have to watch carefully. To prevent buy inferior bearing products, so we want to know some identification method. Bearing quality identification method: 1, arrange ushering bearing manufacturer is introduced first to see the use of the bearing steel material, Germany FAG bearings is their major steel mills of production, and on the hardness and precision than the fake FAG bearings. 2, USES the high input marking equipment, in order to set up the enterprise brand image, to prevent the product was fake, FAG bearing manufacturer with a laser marking machine, hope to set up the enterprise image, in line with international standards, at the same time, with high input to control the product was fake, however, due to the laser marking machine using computer control, mark font, size, etc. Edit the advantages of convenient, not only can effectively prevent counterfeiting, adds difficulty to the counterfeiters. 3, bearing identification methods: observation method. Rolling bearing with the naked eye observation, inner and outer raceway should not crumbling and serious wear and tear, and in a circular groove; All the roller surface should be no spots, cracks and peeling phenomenon; Cage should not loose, without damage, did not wear out, and the roller clearance but big. 4 and soft handle. Normal inner and outer race and rolling elements of bearing clearance is zero. 005-0. 010 mm. For a phase of the rolling bearing has been used, with inner race for the axial shaking fingers clench, should have no obvious shaking noise.